<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRolesVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="[
                'bdbottom',
                i1 === 0 ? 'bdtop' : '',
                'rowpadding',
                'vcenter',
              ]"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套二级权限 -->
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRolesById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配角色</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addRolesVisible"
      width="50%"
      @close="addRolesClosed"
    >
      <!-- 内容主体区 -->
      <el-form
        :model="addRoles"
        :rules="addRolesRules"
        ref="addRolesRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoles.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoles.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRolesVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRolesForm">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑角色的对话框 -->
    <el-dialog
      title="修改角色"
      width="50%"
      :visible.sync="editDialogVisible"
      @close="editDialogClosed"
    >
      <!-- 内容主体区 -->
      <el-form
        :model="editRoles"
        :rules="addRolesRules"
        ref="editRolesRef"
        label-width="80px"
      >
        <el-form-item label="角色ID">
          <el-input v-model="editRoles.roleId" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoles.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoles.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRolesInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配角色对话框 -->
    <el-dialog
      title="分配角色"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树型控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Roles",
  data() {
    return {
      //角色列表
      rolesList: [],
      // 添加角色对话框是否可见
      addRolesVisible: false,
      // 添加角色表单
      addRoles: {
        roleName: "",
        roleDesc: "",
      },
      // 添加角色验证规则
      addRolesRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
          {
            min: 2,
            max: 10,
            message: "长度在 2 到 10 个字符",
            trigger: "blur",
          },
        ],
      },
      // 编辑角色表单
      editRoles: {},
      // 编辑角色对话框的显示与否
      editDialogVisible: false,
      // 控制分配角色的对话框展示与否
      setRightDialogVisible: false,
      // 权限列表
      rightsList: [],
      // 树型控件属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      // 默认选择节点的Id值
      defKeys: [],
      // 即将分配角色的id
      roleId: "",
    };
  },
  methods: {
    // 获取角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200)
        return this.$message.error("获取角色信息失败");
      this.rolesList = res.data;
    },

    // 发起添加角色网络请求
    addRolesForm() {
      this.$refs.addRolesRef.validate(async (valid) => {
        if (!valid) return;
        //校验通过，发起请求
        const { data: res } = await this.$http.post("roles", this.addRoles);
        if (res.meta.status !== 201) {
          return this.$message.error("添加角色失败");
        }
        this.$message.success("添加角色成功");
        //隐藏添加用户的对话框
        this.addRolesVisible = false;
        //刷新表单
        this.getRolesList();
      });
    },

    //监听表单关闭
    addRolesClosed() {
      this.$refs.addRolesRef.resetFields();
    },

    //展示编辑角色对话框
    async showEditDialog(userId) {
      const { data: res } = await this.$http.get("roles/" + userId);
      if (res.meta.status !== 200) {
        return this.$message.error("查询角色信息失败！");
      }
      this.editRoles = res.data;
      this.editDialogVisible = true;
    },

    //监听修改用户表单关闭
    editDialogClosed() {
      this.$refs.editRolesRef.resetFields();
    },

    //修改角色表单提交
    editRolesInfo() {
      this.$refs.editRolesRef.validate(async (valid) => {
        if (!valid) return;
        //发起修改角色信息请求
        const { data: res } = await this.$http.put(
          "roles/" + this.editRoles.roleId,
          {
            roleName: this.editRoles.roleName,
            roleDesc: this.editRoles.roleDesc,
          }
        );
        if (res.meta.status !== 200)
          return this.$message.error("更新角色信息失败！");
        //关闭对话框
        this.editDialogVisible = false;
        //刷新表单
        this.getRolesList();
        //提示信息
        this.$message.success("更新角色信息成功！");
      });
    },

    //根据角色id删除信息
    async removeRolesById(userId) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((error) => error);

      //用户点击确认，confirmResult值为confirm
      if (confirmResult !== "confirm") return this.$message.info("已取消删除");

      const { data: res } = await this.$http.delete("roles/" + userId);
      if (res.meta.status !== 200) return this.$message.error("删除角色失败");
      this.$message.success("删除角色成功");
      this.getRolesList();
    },

    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") return this.$message.info("取消了删除");
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) return this.$message.error("删除权限失败");
      // 不建议使用这个函数，因为会刷新整个页面，那么展出栏就会折叠
      // this.getRolesList();
      role.children = res.data;
    },

    // 展示分配角色的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所以权限的列表
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200)
        return this.$message.error("获取权限列表失败");
      // 获取到的权限数据保存
      this.rightsList = res.data;
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },

    // 通过递归获取角色下的三级权限id列表，并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果是三级节点返回数组
      if (!node.children) {
        return arr.push(node.id);
      }
      // 不是三级节点，进行递归
      node.children.forEach((item) => {
        this.getLeafKeys(item, arr);
      });
    },

    // 监听分配权限的对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = [];
    },

    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];
      console.log(keys);
      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );
      if(res.meta.status !== 200) return this.$message.error('分配权限失败');
      this.$message.success('分配权限成功');
      this.getRolesList();
      this.setRightDialogVisible = false;
    },
  },
  created() {
    this.getRolesList();
  },
};
</script>

<style lang="less" scoped>
.rowpadding {
  margin: 0 40px;
}

.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>